Browsing by Author "Tuke, Robert"

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    Evolution of Anemia Types During Antiretroviral Therapy—Implications for Treatment Outcomes and Quality of Life Among HIV-Infected Adults
    (Nutrients, 2019) Ezeamama, Amara E.; Sikorskii, Alla; Bajwa, Ramanpreet K.; Tuke, Robert; Kyeyune, Rachel B.; Fenton, Jenifer I.; Guwatudde, David; Fawzi, WafaieW.
    This study examined whether the type of anemia in persons living with HIV/AIDS (PLWHA) changed from the beginning of highly antiretroviral therapy (HAART) and had implications for treatment outcomes and quality of life (QOL). If present, the anemia-type was defined as microcytic, macrocytic or anemia of chronic disease (ACD) at study months 0, 6, 12, and 18. Multinomial logistic regression quantified sociodemographic and HIV-treatment factors associated with incident microcytic anemia or ACD over 18 months. Repeated measures linear regression models estimated the anemia-type associated change in the CD4 cell-count, QOL, body mass index (BMI) and frailty over 18 months. Cox proportional hazard models estimated associations between anemia-type and time to (a) gain at least 100 CD4 cells/L and (b) hospitalization/death. Analyses were implemented in Statistical Analysis Software (v.9.4) from which odds ratios (ORs) mean differences ( ) and corresponding 95% confidence intervals (CI) were estimated. At enrollment, ACD, macrocytic and microcytic anemia was present in 36.8% (n = 147), 11.3% (n = 45) and 9.5% (n = 38), respectively with 42% (n = 170) anemia-free. By the study end, only 23% (n = 115) were without anemia. Among the 251 with anemia at the study end, 53.3% (n = 195) had macrocytic anemia, 12.8% (n = 47) had ACD and 2.5% (n = 9) had microcytic anemia. Incident macrocytic anemia was positively associated with baseline hyperferritinemia (OR = 1.85, 95%CI: 1.03–3.32), inversely associated with wealth (OR = 0.87, 95%CI: 0.67–1.03) and inversely associated with efavirenz-containing HAART (OR = 0.42, 95%CI: 0.21–0.85). ACD incidence decreased by 53% (95%CI: 0.27–0.79) per 100 cells/L increase in baseline CD4-cell count and decreased by 90% (95%CI: 0.01,0.87) among adults treated with nevirapine-containing HAART. ACD was associated with a lower BMI at months 6 ( = 􀀀0.33, 95% CI: 􀀀0.64, 􀀀0.01) and 12 ( = 􀀀0.41, 95%CI: 􀀀0.73, 􀀀0.09), with lower QOL ( = 􀀀3.2, 95%CI: 􀀀5.94, 􀀀0.53) at month 12 and with elevated frailty ( = 1.2; 95%CI: 0.46, 1.86) at month 12. Macrocytic anemia did not predict a post-enrollment change in CD4, BMI or QOL during follow-up. However, the time to gain 100 CD4 cells/L was 43% slower (p < 0.05) and the frailty was higher at month 12 for PLWHA with the baseline or sustained macrocytic vs. no anemia. A substantial decline in ACD and microcytic anemia occurred in tandem with large increase in the macrocytic anemia over 18 months on HAART. Interventions to mitigate all anemia—particularly ACD, is expected to improve the immune recovery rate, lower frailty, and enhanced QOL.
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    Psychosocial Adjustment in Ugandan Children: Coping With Human Immunodeficiency Virus Exposure, Lifetime Adversity, and Importance of Social Support
    (New Directions for Child and Adolescent Development, 2020) Tuke, Robert; Sikorskii, Alla; Zalwango, Sarah K.; Webster, Kyle D.; Ismail, Alexander; Pobee, Ruth A.; Barkin, Jennifer L.; Boivin, Michael J.; Giordani, Bruno; Ezeamama, Amara E.
    Cumulative lifetime adversity and social support were investigated as determinants of psychosocial adjustment (esteem, distress, hopefulness, positive outlook/ future aspirations, and sense of purpose) over 12months in 6–10-years-old HIV-infected, HIV-exposed uninfected and HIV-unexposed uninfected children from Uganda. Each determinant and psychosocial adjustment indicator was self-reported using standardized questionnaires administered at baseline, 6, and 12 months. Linear mixed effects models were used to relate time-varying lifetime adversity and social support to psychosocial adjustment over 12 months. Regardless of HIV status, higher adversity predicted lower esteem (coefficient b = −2.98, 95% confidence interval (CI): [−4.62, −1.35]) and increased distress (b =3.96, 95% CI: [1.29, 6.62]) but was not associated with hopefulness, positive outlook or sense of purpose. Low social support predicted higher distress (b =9.05, 95% CI: [7.36, 10.73]), lower positive outlook
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    Serum Vitamin D is Di erentially Associated with Socioemotional Adjustment in Early School-Aged Ugandan Children According to Perinatal HIV Status and In Utero/Peripartum Antiretroviral Exposure History
    (Nutrients, 2019) Yakah, William; Fenton, Jenifer I.; Sikorskii, Alla; Zalwango, Sarah K.; Tuke, Robert; Musoke, Philippa; Boivin, Michael J.; Giordani, Bruno; Ezeamama, Amara E.
    An impact of vitamin D in neurocognitive function has been theorized but it remains unknown whether vitamin-D insufficiency (VDI) is associated with worse socio-emotional adjustment (SEA) in vulnerable early school-aged children. This study examines the thesis that deficits in SEA are related to VDI using longitudinal data from 254 children that are perinatally HIV-infected (PHIV), exposed-uninfected (HEU), or unexposed-uninfected (HUU). In utero/peripartum antiretroviral (IPA) exposure was established per medical record documentation of biological mother’s ART regimen in pregnancy. Four caregiver-reported age- and sex-standardized measures of SEA were obtained at months 0, 6, and 12 for dependent children aged 6–10 years: externalizing problems (EPC), internalizing problems (IPC), behavioral symptoms index (BSI), and adaptive skills index (ASI). VDI was highly prevalent (74%, n = 188), and its association with change in SEA measures over 12 months varied by HIV-status (VDI*HIV, all p-values < 0.03). There was further variation in relationship of vitamin-D to SEA by IPA among PHIV (for ASI, BSI, and EPC, vitamin-D*IPA, p-value ≤ 0.01) and HEU (for BSI and EPC, vitamin-D*IPA, p-value ≤ 0.04). Among HUU, BSI (β = −0.32, 95% CI: −0.50, −0.13), IPC (β = −0.28, 95% CI: −0.47, −0.09), and EPC (β = −0.20, 95% CI: −0.37, −0.02) all declined moderately per quartile increment in VD. Among PHIV, on the one hand higher vitamin D predicted ASI gains (moderate vs. low VD, β = 0.52, p = 0.002), but this protective association was absent for BSI, EPC, and IPC (β = 0.36–0.77, p < 0.05). In absence of IPA-exposure, increasing vitamin-D predicted declines in BSI and EPC (moderate vs. low Vitamin D, β = −0.56 to −0.71, p ≤ 0.02) among HEU. However, given IPA exposure among HEU, higher VDI predicted moderate elevation in BSI (β = 0.39, 95% CI: 0.00, 0.78) and IPC (β = 0.48, 95% CI: 0.05, 0.92). Interaction between VD and IPA exposure for SEA outcomes among HEU and PHIV children warrants further investigation. The vitamin-D associated SEA improvement among HUU and HEU without IPA exposure suggests vitamin-D supplementation may remediate behavioral and adaptive deficits in this groups. View Full-Text
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    Toxic Stress and Quality of Life in Early School-Aged Ugandan Children With and Without Perinatal Human Immunodeficiency Virus Infection
    (Wiley Periodicals, Inc., 2020) Ezeamama, Amara .; Zalwango, Sarah .; Tuke, Robert; Lauren, Ricki.; Boivin, Michael .; Musoke, Philippa .; Giordani, Bruno; Sikorskii, Alla
    Caregiver’s and child’s self-reported quality of life (QOL) was defined using standardized questionnaires in a sample (N = 277) of 6–10 years old HIV-infected, HIV-exposed uninfected, and HIV-unexposed uninfected children from Uganda. Psychosocial stress (acute stress and cumulative lifetime adversity) and physiologic stress (dysregulations across 13 biomarkers), perinatal HIV status, and their interaction were related to child QOL via general linear models. Lower child- and caregiver-reported psychosocial stress were dose-dependently associated with higher QOL (acute stress: mean difference coefficient b = 8.1–14.8, effect size [ES] = 0.46–0.83). Lower allostasis was dose-dependently associated with higher QOL (b = 6.1–9.7, ES = 0.34–0.54). Given low caregiver acute stress, QOL for HIV-infected was similar to HIV-uninfected children; however, given high caregiver acute stress, a QOL disadvantage (b = −7.8, 95% CI: −12.8, −2.8; ES = −0.73) was evident for HIV-infected versus uninfected children.Testing of caregiver stress reduction interventions is warranted to increase wellbeing in dependent children.